Operators are looking to extend the profitable life of their fields, which often requires drilling through problematic environments, or trouble zones. To enable safe, efficient, and economical drilling through these zones, Baker Hughes introduced the DrillThru solution, which offers a proven, comprehensive work flow to overcome the challenges associated with trouble zones. The work-flow process starts with gathering and contextualizing reservoir and field data so that all potential threats are identified and interpreted through geomechanical models. The service company then designs a customized well path and a detailed plan to construct the well through any potential trouble zones. Each solution prescribes the most-appropriate remedies for addressing identified trouble zones. In one recent application, the company designed and implemented a solution in the North Sea for an operator that needed to accommodate an unstable shale formation protruding into the pay zone. The service company developed a solution that could capture additional reserves without risking wellbore integrity. A steerable drilling liner was combined with careful fluid management to directionally drill through the unstable shale. Drilling and laying liner simultaneously prevented the wellbore from collapsing, and enabled access to previously bypassed reserves. This solution delivered an additional 758 ft of pay-zone contact, boosting recovery by an estimated 350,000 bbl of oil.
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